When I was little, I used to absolutely love the video on Sesame Street when they dropped an orange ball down a tube and you watched it hit something that made something else move and so on until the ball went into a silver container,and it was ground up into powder ( never did figure out why that happened!).

I loved the cause and effect of that kind of thing. Michael is the same way. He watched videos that show the same kind of cause and effect. He even attempted to do something like this with some tubes and ramps.